Device for spraying hot fluid substances



M H NERI DEVICE FOR SPRAYING HOT FLUID SUBSTANCES Filed April 4, 1921 2 Sheets-Sheet l June 5, 1923.

Jline s, 1923.

M. H. NERI DEVICE FOR SPRAYING HOT FLUID SUBSTANCES Filed April 4, 1921 2 Sheets-Sheet 2 ATTORNEY Patente'd June 5, 1923. i

. UNITED STATES mom. Hermon nnr, or os mourns, CALIFORNIA.

DEVICE FOR SPRAY 117G HOT FLUID SUBSTANCES.

Application filed April 4, 1921. Serial I0. 458,891.

To all whom it may concern:

Be it knownthat I, MANUEL Hurrno1s Nam, a citizen of the United States, and resident of Los Angeles, in the county of S Los An Ice and State of California, have invente certain new and useful Improvements in Devices for Spraying Hot Fluid Substances, of which the following is 'a specification.

This invention relates to devices for spraying hot fluid substances, having reference particularly to an electrically heated and operated apparatus for spraying hot tar in the process of enamelin The invention has for its ob ects the provision of means for electrically heatlng, conducting, pumping and spraying hot tar, comprisin an assemblage of simply constructed e ements arranged in readily op- 20 erable and novel correlation in such man:

nor as to maintain an even temperature and obviate cooling of the fluid while it flows.

through the apparatus.

The above named and other objects are attained by employing an electric motor,

an electrically heated duplex pump operable by said motor, electrically heated means for feeding fluid to said ump, electrically heated means for conducting and discharging fluid from said pump, means for controlling the electric motor, and means for encasing, assembling and mounting the parts, and other novel features, all as hereinafter fully described and specifically set forth in the appended claims.

In the accompanying drawings forming part of this specification, Figure 1 is a side elevation illustrating an embodiment of my improvements, parts thereof being shown in sectional elevation;

Fig. 2 a vertical sectional view taken on the line 2-2 of Fig. 1;

Fig. 3 is a sectional plan view taken on the line 3-3 of Fig. 2; and Fig. 4 is a longitudinal sectional View of a fragment of tubing adapted to be employed in the apparatus assemblage. i

In the drawings 1 indicates an electric motor of any adaptable construction and capacity; to the shaft of said motor is connected a bevel pinion 2 which meshes with a bevel wheel 3, mounted on a transverse horizontal shaft 4 which is journaled through standards 5 fixed on the up r wall of a housing 7, said housing 520 supporting a fixed bracket 8 which carries the motor 1.

The shaft 4 carries on one end a wheel 9, having a crank-pinlO which is in pivotal connection with a connectin rod 11, said rod engages at its lower en a reciprocatng piston 12 of a cylinder 13, said 0 linder is open at the to and closed at the bottom and 1s supporte by the lower wall of the housing 7. On the other end ofthe shaft 4 is a wheel 9, having a crankin 10, which is in pivotal engagement .wit a connecting rod 11", which engages a reciproeat ng piston 12, of a cylinder 13*, said cylinder also being closed at the bottom and open at the top.

Each of the cylinders is provided with an inlet opening 14, having seated therein a conical valve 15, said valve having a stem 16 which reciprocates through a fixed s ider 17, a head 18 being formed on the l bwer end of the valve stem which supports a normally expanded spiral spring 19, adapted for maintaining the valve 15 normally closed. Laterally connecting the. cylinders 13 and 13, is casing 20 having at one end an opening 21 which communicates with an outlet port 22 of the cylinder 13, the opposite end of said casingv having an openmg 21, which communicates with an outlet port 22 of the cylinder 13", these openings of the casing are ground for seating valves 23 and 23 which are mounted on a common stem 24 which reciprocates througha fixed bearing 25, whereby said valves may be alternately opened and closed, as hereinafter described.

Leading upwardly from the valve casing 20 is a tubular outlet 26 which connects with an elbow 27, said elbow being coupled to a lateral tube 28 which extends through the housing 7 and is coupled to a reinforced flexible tube 29, which is connected, by means of a coupling 30, with 'a branch 31 of an ejector comprising said branch 31 and an obliquely extended nozzle member 32 having a contracted outlet 33. As a means for controlling the flow of fluid through the outlet 33, whereby it may be atomized, I provide a needle valve 34 having a screw-threaded outer end part 35 which is threaded through a stud 32,of the branch 32 and is adapted to be turned by housing 36 having in its lower end an as'bes-' tos plug 37 through which extends resilient contact plates 38 and 39 which are adapted to be contacted by a spring-pressed push button 40, composed of insulating material, the plates 38 and 39 being normally out of contact. These plates are electrically connected with the two. conductors 41 and 42 which are in an electrical circuit in connec tion with the motor 1, whereby the circuit may be alternately, opened and closed by manipulating the push button 40. The wire conductors 41 and 42 are encased in an ordinary insulator tube 43 mounted on the flexible tube 29, by means of a collar 44, only a short section of tube 43 being shown, and

the means for connecting the conductors with the motor are not shown, as I use any well known adaptablemeans now in common else. To the housing 36 is connected a handle 36, whereby the ejector may be moved over a sur- -face to be coated.

- As a means for feeding fluid substance to the cylinders 13 and 13", I employ a vertical tube 45, having a branch 46 which leads into the cylinder 13, and a branch. 47 which leads into the cylinder 13; this tube 45 and its branchesare encased within a mica coating 48, around which is coiled a high resistance conductor 49 which is covered by means of a mica coating. 50, whereby the conductor 50 is effectually-insulated, a metal casing 51 being employed as a means .for. protecting the mica and maintaining the parts in rigid'connection.

- Fixed to the lower end of the housing 7 by means of bolts 52 and nuts 53, is a cylindrical screen 54 having heads 55 and 56, thus providing means for screening the molten tar and preventing foreign substances from bein drawn into the apparatus. e cylinders 13 and 13, are also surrounded by means of a high resistance con.- ductor 57 and mica insulators 58 and 59; and a Similar high resistance conductor 60 is coiled around the two branches of the.

ejector for maintaining said ejector heated when the device is in use, said conductor being insulated by means of mica. coatings 61 and 62, as shown in Fig. 1. of the drawings wherein only parts of the" heating element and its insulators are shown, but in practise the entire ejector is covered. A heating element may also be incorporated in the structure of the flexible tube 29, if desirable, as

indicated by 29 Fig. 4 of the drawings.

In pract1ce the several heating elements are interposed in an electrical circuit either in connection with the motor 1 or any other source of supply of sufiicient capacity to energize them.

The bracket-*8 for carrying the motor 1, is"-provided with an extension 8; through which is threaded a screw 63 having a spherical end 64 which is'swiveled to a clamp 65 for engagement with a tank, as 66, Fig. 1 of the drawings, for containing a supply of hot molten tar for feeding the apparatus.

Pivoted to the extension 8, of the bracket 8, is an extensible and contractible leg 67, which is connected by means of a screw 68 and a thumb nut 69, said leg comprising two slidable members 70 and 71, adapted to be locked by means of a thumb screw 7 2, whereby the leg may be maintained at any desired length for contact with a surface upon which the tank 66 is placed, for the purpose of stabilizing the structure and maintaining it in rigid condition when in use,

In the operaton and use of the invention,

the apparatus is clamped to a tank 66 c0nwhereupon reciprocating movement is transmitted to the pistons 12 and 12, by means of the motor 1. and the heating elements con.- stituting the high resistance coils are electrically heated to maintain the high tomperature of the tar while it passes through the apparatus, the tar being drawn into the cylinders through the valves 15 on the upward strokes of'the pistons and forced alternately through thevalves 21 and 21. into the outlet tube 26, and thence to the flexible tube 29 and the ejector on the downward strokes, whereby a constant flow of hot tar is ejected through the aperture 33 of the nozzle andv atomized by means of the needle valve 34, to. evenly spread it on the surface being coated or enameled, the ejector being manipulated by means of its handle 36.

When the apparatus is not in use, or im inediately after and before its use it should be electrically heated-and thoroughly cleaned by pumping air therethrough, and the flexible tube 29 should be thoroughly, heated before attempting to bend it.

I do not wish to be understood as limiting myself to the employment of the specific detalls ofmere mechanical construction of the elements of my improvements as herein shown and described, as I believe that under the spiritof my invention and'scope of the appended claims I am entitled to employ sli ht variations of mechanical construction;

1. An apparatus for enameling surfaces with hot tar, comprising an electric motor, a pump, means for transmitting said pump and means for electrically heating it, and means for conducting hot tar from said pump,'and means for electrically heating said conducting means.

2. An apparatus for enameling surfaces with hot tar, comprising an electric motor, a duplex pump, means for transmitting power to said pump, and means for electrically heating, housing and screening said pump.

3. An apparatus for enameling surfaces with hot tar, comprising an' electric motor, a duplex pump constituting two cylinders,

. reciprocating pistons and a two-branched inlet tube, feed valves for said cylinders, and valve means laterally connecting them, and high resistance conductors surrounding said cylinders and said inlet tube, an ejector and means connecting it with the outlets of the cylinders, and means for electrically heating said ejector.

4. An apparatus for enameling surfaces with hot molten substances, comprising an electric motor, a duplex pump, means for transmitting power to said ump, and means for housin and e'lectrica 1y heating said pump, and feeding means for said pump and means for electrically heating the same, and means connected with said pump for conducting and ejecting hot fluid substance, and means for electrically heating said conducting and ejecting means.

5. An apparatus for enameling surfaces with hot molten substances, comprising an electric motor, a duplex pump, means for electrically heating said pump, means for transmitting power from said motor to said pump, and valved feeding means for said pump, and .means for electrically heatin said feeding means, and means'connecte with said pump for conducting and ejecting the hot fluid substance, and means for electrically heating said conducting and ejectpower to ing means, and means for housing and mountin the pump, and a screen surrounding the ceding means.

6. An apparatus for enameling surfaces with hot molten substances, comprising an electric motor, a duplex pump, means for transmitting power from said motor to said pump, and valved feeding means for said pump, and means for electrically heating said feeding means, and means for housing and electrically heating said pump, and means for supporting said motor on said housing means and means for fastening the appparatus to a container, and adjustable su porting means for stabilizing the device.

An apparatus for enameling surfaces with hot molten substances, comprising an electric. motor, a duplex pump, means for transmitting power from said motor to said pump, and valved feeding means for said pump, and means for electrically heating said feeding means, and means for housing said pump and means for electrically heating the same, and means for supporting said motor on said housing means, and an ejector, and means for conducting the hot substance from the pump to said ejector, and means for electrically heating said ejector, means for controlling the motor.

8. In an apparatus for enameling surfaces with hot molten substances, an electric motor, control means for said motor, a pump, power transmission means for operating said pump, feed means for said pump, means for electrically heating said pump and feed means, and means for conducting the hot molten substance from said pump, and ejector means connected with said conducting means, and means for electrically heating said ejlector means, and means for controlling t e supply of current for the heating means.

Signed at Los Angeles, in the county of Los Angeles, and State of California, this twenty-ninth da of A ril, 1922, A. D.

, MA UEL l -lUITRON NERI 

